Hi! > > I agree this needs to be tunable (and with the other suggestions). But > > this is actually not the most important tunable: the detection > > threshold (rh_attr.sample_period) should be way more important. > > So being totally ignorant of the detail of how rowhammer abuses the DDR > thing, would it make sense to trigger more often and delay shorter? Or > is there some minimal delay required for things to settle or > something.
We can trigger more often and delay shorter, but it will mean that
protection will trigger with more false positives. I guess I'll play
with constants too see how big the effect is.
BTW...
[ 6267.180092] INFO: NMI handler (perf_event_nmi_handler) took too
long to run: 63.501 msecs
but I'm doing mdelay(64). .5 msec is not big difference, but...
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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